Using
Intrets' zero friction floors I made auto-edgebug replacements that work 100% of the time (as far as I can tell). They also work on auto-edgebug ramps like the one on Aigis C2.
For normal auto-edgebugs, just put down the playerclip as normal and put the frictionless trigger on top of it (I'd put it at least 2 units high just in case you can bug the same way random bounces work)
For auto-edgebug ramps you'll want to make an invisible staircase of playerclips on the ramp as if you put it straight on a ramp it gives you an inconsistent speed boost.
Here's an example map using both:
VMF
BSPIt's a bit jerky on ping, especially if you use a really tall trigger. I put my triggers ~8 units above the floor.